<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    <div id="app">
        <my-component :width="100"></my-component>
    </div>
    <script src="https://unpkg.com/vue/dist/vue.min.js"></script>
    <script>
        Vue.component('my-component',{
            props:['width'],
            template:'<div :style="style">组建内容</div>',
            computed:{
                style:function(){
                    return{
                        width:this.width + 'px'
                    }
                }
            }
        });
        var app = new Vue({
            el:'#app'
        })
    </script>
</body>
</html>